docs: def format_call(self, api_version, api_call):
          """ Return properly formatted QualysGuard API call according to api_version etiquette.
  
          """
          # Remove possible starting slashes or trailing question marks in call.
          api_call = api_call.lstrip('/')
          api_call = api_call.rstrip('?')
          logger.debug('api_call post strip =\n%s' % api_call)
          # Make sure call always ends in slash for API v2 calls.
          if (api_version == 2 and api_call[-1] != '/'):
              # Add slash.
              logger.debug('Adding "/" to api_call.')
              api_call += '/'
          if api_call in self.api_methods_with_trailing_slash[api_version]:
              # Add slash.
              logger.debug('Adding "/" to api_call.')
              api_call += '/'
          return api_call